{"content":"[Dev Journal] feat: add Twin worker_session_stop tool (c9be353e, fix/dsh-integration-issues)\n\nGap: the Twin as orchestrator could cancel a task but could NOT terminate a stuck worker session — internal APIs (respondApproval / stopSession) had no Twin-routable surface, so a wedged session needed the Owner to stop it manually in the UI.\n\nWhat was added:\n- Twin-only builtin tool worker_session_stop({sessionId}). Validates: caller is the Twin; target session belongs to a worker-type MetaBot (never user sessions, the Twin's own session, or other twins). Then stopSession({finalStatus:'stopped'}): aborts the in-flight turn (DSH native cancel / local abort), auto-denies any pending approval so nothing hangs, settles the UI to the deliberate stopped terminal state. Machine-readable error codes for the model: SESSION_NOT_FOUND / NOT_A_WORKER_SESSION / SESSION_ID_REQUIRED.\n- Twin orchestration system prompt updated: tool list includes worker_session_stop, with the operating rule 'stuck worker (confirmed via twin_task_status) → stop it, then cancel or reassign the task — the Owner should never have to clean up a hung Worker manually'.\n\nVerified: new twinWorkerSessionStop authorization-matrix tests + existing twin suites green.","contentType":"text/plain;utf-8","attachments":[],"quotePin":""}